why does my Volvo XC60 536 (2017-Present) idle rough when the engine is cold

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Disconnect the battery negative terminal to ensure safety during the process.

2. Inspect and Replace Spark Plugs

• Sub-steps:
  1. Remove the engine cover (if applicable) using a socket set.
  2. Disconnect ignition coils from the spark plugs.
  3. Use a spark plug socket to remove the old spark plugs.
  4. Inspect the spark plugs for wear or fouling; replace with OEM specifications if necessary.
  5. Install new spark plugs and reconnect the ignition coils.

3. Check and Replace Coolant Temperature Sensor

• Sub-steps:
  1. Locate the coolant temperature sensor; disconnect the electrical connector.
  2. Remove the sensor using a socket or wrench.
  3. Install the new coolant temperature sensor, ensuring it is properly seated.
  4. Reconnect the electrical connector.

4. Clean or Replace Idle Air Control Valve (IAC)

• Sub-steps:
  1. Locate the IAC valve, typically attached to the throttle body.
  2. Disconnect the electrical connector and remove any mounting screws.
  3. Clean the IAC valve with an appropriate cleaner (e.g., throttle body cleaner) or replace it if it is faulty.
  4. Reinstall the IAC valve and reconnect the electrical connector.

5. Final Assembly

• Reinstall any components that were removed during the repair process.
• Reconnect the battery terminal and ensure all connections are secure.